/*  Copyright 2011 AIT Austrian Institute of Technology
*
*   This file is part of OpenTLD.
*
*   OpenTLD is free software: you can redistribute it and/or modify
*   it under the terms of the GNU General Public License as published by
*    the Free Software Foundation, either version 3 of the License, or
*   (at your option) any later version.
*
*   OpenTLD is distributed in the hope that it will be useful,
*   but WITHOUT ANY WARRANTY; without even the implied warranty of
*   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
*   GNU General Public License for more details.
*
*   You should have received a copy of the GNU General Public License
*   along with OpenTLD.  If not, see <http://www.gnu.org/licenses/>.
*
*/
/*
 * EnsembleClassifier.h
 *
 *  Created on: Nov 16, 2011
 *      Author: Georg Nebehay
 */

#ifndef ENSEMBLECLASSIFIER_H_
#define ENSEMBLECLASSIFIER_H_

#include <opencv/cv.h>
#include <memory>
#include <random>

namespace tld
{
    class EnsembleClassifier
    {
        const unsigned char *img;

        float calcConfidence(int *featureVector);
        int calcFernFeature(int windowIdx, int treeIdx);
        void calcFeatureVector(int windowIdx, int *featureVector);
        void updatePosteriors(int *featureVector, int positive, int amount);
    public:
        bool enabled;

        //Configurable members
        int numTrees;
        int numFeatures;

        int imgWidthStep;
        int numScales;
        cv::Size *scales;

        int *windowOffsets;
        int *featureOffsets;
        float *features;

        int numIndices;

        float *posteriors;
        int *positives;
        int *negatives;

        DetectionResult *detectionResult;

        EnsembleClassifier();
        virtual ~EnsembleClassifier();
        void init(std::shared_ptr<std::mt19937> rng);
        void initFeatureLocations(std::shared_ptr<std::mt19937> rng);
        void initFeatureOffsets();
        void initPosteriors();
        void release();
        void nextIteration(const cv::Mat &img);
        void classifyWindow(int windowIdx);
        void updatePosterior(int treeIdx, int idx, int positive, int amount);
        void learn(int *boundary, int positive, int *featureVector);
        bool filter(int i);
    };
} /* namespace tld */
#endif /* ENSEMBLECLASSIFIER_H_ */
